Improvement in locks



AM. PHOTO-LITRO. CLIN-Y (DSEDRNE'S PROCESS) UNITED STATES ALONZO E. DEITZ, OF BROOKLYN, NEW YORK.

lMPROVElVI ENT IN LOCKS.

Specification forming part of Letters Patent No. 5l ,152, dated November 28, 1865.

To all whom t may concern:

Be it known that I, ALONZO E. DErrz, of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Burglar Proof Attachment for Locks and Latches; and'I do hereby declare that the i'ollowing is a full, clear, and exact description thereof', which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, thrming part ot' this specification, in which- Figure lis an external view ol my invention; Fig. 2, a longitudinal section of the same taken in the line a w, Fig. 1; Fig. 3, a longitudinal section of a modification of the same; Fig. 4, a transverse section of Fig. 2 taken in the line y y, and Fig. 5, a face view of the key pertaining to the same. v

-Similar letters ot' reference indicate corresponding parts.

The object of this invention is to obtain a simple, economical, and burglar-proof attachment, which may be applied to all kinds of locks and latches without injury to the door, and which will render any ordinary lock or door to which said lock may be applied secure against burglary, the device being capable of being used as a night-latch, or as an auxiliary attachmena'or so as to form'the only means for operating the bolt.

A represents a case, which contains an ordinary slide-bolt, B, arranged in the usual way; and O is a tube which is attached permanently to the case A, projecting from its side at right angles, and having a series of chambers, a, made in it longitudinally to receive pins D, four of which are used in this instance, as shown in Fig. 4. These chambers a contain spiral springs d, against which the pins D bear, each pin being reduced in diameter at one end to iit into said springs, as shown clearly in Fig. 2.

E is a rotary tube, which may be of the same diameter as G, and provided with a similar number of chambers a', in which pins F, similar to D, are itted. The chambers a', however, are not provided with springs, and they extend entirely through E, and the tube E has a rod, e, extending centrally from its inner end, and this rod fits into a chamber, j', made centrally in tube G, said rod e serving as a guide or center for E to turn on.

The abutting ends of the tubes GF have plates g attached to them, through which holes are made for the pins D F to pass through the holes in said plates, being ot such a diameter as to admit of the pins working singly in them, while the chambers a a! are a tritle larger in diameter, as shown in Fig. 2.

The abutting ends of the pins D F have a series ot' grooves, 7L, made circumferentiall y in them, the use oli' which will be presently explained, and the outer ends ot' the pins F are turned down, as shown at t', so as to be considcrably smaller in diameter than the main portions, the chambers a2 in tube E, in which the parts IiI ot' the pins F lit, being of a diameter equal to said parts.

The diminished parts t' ot' the parts F are eccentric with the larger or main portions in order to prevent the pins Vbeing withdrawn from E by drilling the chambers a2 larger from the outer end of E. By this means a burglar will be completely foiled in endeavorin g to remove the pins by drilling.

G represents a tube, which is fitted on the tube E, and is secured thereto by screw j. This tube G extends over the fixed tube O, and is provided at its inner end with a foot or projection, K, which acts against a pin, I., on bolt B. In order, therefore, to throw back the bolt B, the tubeE requires to be turned, and to et'- feet this the pins D F require to be adjusted so that their abutting ends will be precisely in line with the abutting sides of the plates g of the tubes O E, for the pins D of the tube O are forced into the chambers a ot' the tube E, and said pins are ot' different lengths, so that each one will require to be pushed into C a dif'- vferent distance in order to admit of the turning of E. The pins D are operated upon by the pills F, and the pins F are actuated by a key, G, which is provided with bits m of different lengths, corresponding to the diit'erence in the length of the pins D. Thus it will be seen that the device will be dificult to pick or open :in an illegitimate manner.

Drilling, as before stated, is rendered impraeticable, and picking also, for the reason that the pins D F, in case of being tampered with separately, will catch into or engage with the plates gby means oi' the circumferential grooves 71., previously described.

A slight modification of the above arrangement is shown in Fig. 3, in which the foot or projection K is attached to a spindle, I, which passes centrally through tube G and into tube E, the latter bein g secured to the spindle. This arrangement dispenses with the exterior tube, G. rlhe device, however, is essentially the same in both eases.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination of the separate tubes C, E, and G, the separate sets of pins or tumblers D D and F F, and the eccentric pins i fi, all arranged and operating substantially as and for the purposes set forth.

2. The plates g g, at the inner ends of the tubes C E, in connection with the grooves h, made eircumferentially in the pins D F, substantially as and for the purpose specied.

3. Having the outer parts of the pins F diminished or reduced in diameter and eccentric with the main portions, substantially as and for the purpose set forth.

ALONZO E. DEITZ.

Witnesses:

M. M. LIVINGSTON, G. L. ToPLrFF. 

